Senior Propulsion Engineer

Castelion Corporation • Torrance, CA

12h

About The Position

The Senior Propulsion Engineer plays a critical role at Castelion, owning the design of solid rocket motor primary and secondary structures as well as key propulsion components. This position is central to our ability to deliver at speed and scale, with a strong emphasis on driving technically sound designs that meet aggressive schedule, affordability, and production goals.

Requirements

• Bachelor's or advanced degree in aerospace engineering, manufacturing engineering, materials engineering, mechanical engineering or physics.
• 5+ years of mechanical or fluids design, analysis, or build experience (student project team, university rocketry club and internship experience counts).
• Effective communication skills are crucial for collaborating with cross-functional teams, presenting design concepts, and documenting work.

Nice To Haves

• Proficient in test methods/setups, with the ability to conduct trade studies using engineering fundamentals to make informed recommendations, even with limited information.
• Extensive experience working with aerospace materials (including metals, plastics, and composites) and a solid understanding of spacecraft and/or launch vehicle propulsion systems and fluid components.
• Skilled in CAD software (NX 8.5 or similar packages like PTC Creo, CATIA) with expertise in geometric dimensioning and tolerancing (GD&T) per ASME Y14.5-1994.
• Relevant experience with rocket motors, solid propulsion elements, and structural interfaces, including knowledge of insensitive munitions protocols and practices.
• Hold a Master's degree or PhD in a technical discipline such as mechanical or aerospace engineering.
• Hands-on experience supporting rapid product development, including designing hardware for high-rate production in alternative non-aerospace domains.
• Currently hold an active DoD Secret Security Clearance or higher.

Responsibilities

• Translate project objectives into cost-effective designs that can be produced at scale – the Castelion way.
• Spearhead the creation of innovative solid rocket motor designs, demonstrating autonomy even with limited expert guidance.
• Actively engage in the assembly, testing, and troubleshooting of prototypes and production builds, providing expert guidance as necessary.
• Use our rapid iteration cycles to validate product performance and facilitate necessary design adjustments.
• Produce, evaluate, and authorize CAD models and drawings, adhering to internal standards and ASME Y14.5-2009 guidelines.
• Provide thorough assessments and resolutions for any discrepancies in hardware, including supporting analyses when required.
• Collaborate with supply chain to ensure seamless support and adapt designs to mitigate availability risks and time delays.

Benefits

• All full-time employees are granted meaningful long-term equity, sharing in the company's significant growth trajectory.
• We offer four (4) weeks of paid time off, ten (10) company-paid holidays, and comprehensive health benefits - including 100% employee-covered medical and strong dependent coverage, along with dental and vision plans.
• We also provide paid parental leave to support growing families, a $100 monthly fitness stipend to promote health and performance, and onsite EV charging for convenience.
• In addition, employees enjoy perks like catered meals, company-covered food during high-demand periods, and a fully stocked kitchen to stay fueled throughout the day.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior